基于椭圆法的交流信号实时处理方法

Real-time AC Data Processing Method Based on Elliptical Method

提出一种基于椭圆法的数据处理方法。与傅立叶变换相比,本方法仅要求等时间间隔采集数据,把频率和直流分量作为未知量,有效克服了系统频率波动对处理结果的影响。采用椭圆拟合实现数字滤波,滤波效果好。采用本方法对电力系统电压、电流信号采集和处理,获得了满意的结果。本方法具有实时性好,处理结果准确、硬件结构简单等优点,具有较高实用价值。

The real-time AC data processing troduced. Comparing with Fourier algorithm, method based on elliptical method is inthis method only need acquire data that have equal time-span. The frequency and DC component are unknown quantities, so the effect of the result, which caused by the undulate of the frequency, is overcome effectively. The digital filtration is realized by elliptical fitting, which has a satisfactory result. Adopting this method, we realized the data acquisition and processing of the voltage and current signal in the power system. This method has many advantages, such as high speed, high accuracy and simple structure in hardware. Also method has practical value.